IAE Sorbonne's Business School, University of Paris1, University of Bonn - Economic Science Area, affiliation not provided to SSRN, University of Southern California - Department of Economics, University College London - Centre for Economic Learning and Social Evolution (ELSE), University of Toulouse, University of California at San Diego, affiliation not provided to SSRN, INSEAD, Massachusetts Institute of Technology (MIT) - Sloan School of Management, Columbia Business School - Management & Psychology, Massachusetts Institute of Technology (MIT) - Sloan School of Management and University of Warwick - Warwick Business School